Journal ArticleDOI
Evidence for a Second Crystal Form of Polypropylene
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In this paper, an attempt is made to account for the observed birefringence of the various types of polypropylene spherulite in terms of preferred crystalline orientation.Abstract:
An attempt is made to account for the observed birefringence of the various types of polypropylene spherulite in terms of preferred crystalline orientation. Evidence is also presented showing that some of these spherulites crystallize with a new metastable crystal structure, not previously described.read more
Citations
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Journal ArticleDOI
Spherulitic Crystallization in Polypropylene
F. J. Padden,H. D. Keith +1 more
TL;DR: A survey of spherulites formed by the isothermal crystallization of polypropylene from the melt in the temperature range 110°−148°C is given in this paper. But their structural morphology, optical properties, melting behavior, and growth rates have not been examined.
Journal ArticleDOI
Structure and morphology of poly(propylenes): a molecular analysis
TL;DR: In this article, the progress made in the understanding of the crystal polymorphism and morphology of isotactic and syndiotactic poly(propylene) (iPP and sPP) is reviewed.
Journal ArticleDOI
Supermolecular structure of isotactic polypropylene
TL;DR: In this article, the crystalline structure, spherulitic crystallization and melting behavior of isotactic polypropylene (iPP) is comprehensively reviewed, illustrated and discussed.
Book ChapterDOI
Infrared spectra of high polymers
TL;DR: In this article, the spectral properties of polyethylene terephthalate and three deuterated analogs have been obtained in the region of 70 to 3600 cm-i, polarized spectra having been obtained down to 330 cm-l. This assignment suggests a modification of the proposed chain structure of this polymer.
Journal ArticleDOI
The spherulitic and lamellar morphology of melt-crystallized isotactic polypropylene
D.R. Norton,A. Keller +1 more
TL;DR: In this paper, the basic morphology of melt-crystallized isotactic polypropylene (iPP) was investigated using both optical and electron microscopy, and specific correlations were obtained between the structural entities on all scales of the structure hierarchy.
References
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Journal ArticleDOI
Spherulitic Crystallization in Polypropylene
F. J. Padden,H. D. Keith +1 more
TL;DR: A survey of spherulites formed by the isothermal crystallization of polypropylene from the melt in the temperature range 110°−148°C is given in this paper. But their structural morphology, optical properties, melting behavior, and growth rates have not been examined.